Geometric calibration for a SPECT systemdedicated to breast imaging

WU Li-Wei; CAO Xue-Xiang; WANG Lu; HUANG Xian-Chao; CHAI Pei; YUN Ming-Kai; ZHANG Yu-Bao; ZHANG Long; SHAN Bao-Ci; WEI Long

doi:10.1088/1674-1137/36/10/019

Chinese Physics C> 2012, Vol. 36> Issue(10) : 1019-1024 DOI: 10.1088/1674-1137/36/10/019

Geometric calibration for a SPECT systemdedicated to breast imaging

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Geometric calibration is critical to the accurate SPECT reconstruction. In this paper, a geometric calibration method was developed for a dedicated breast SPECT system with a tilted parallel beam (TPB) orbit. The acquisition geometry of the breast SPECT was firstly characterized. And then its projection model was established based on the acquisition geometry. Finally, the calibration results were obtained using a nonlinear optimization method that fitted the measured projections to the model. Monte Carlo data of the breast SPECT were used to verify the calibration method. Simulation results showed that the geometric parameters with reasonable accuracy could be obtained by the proposed method.

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WU Li-Wei, CAO Xue-Xiang, WANG Lu, HUANG Xian-Chao, CHAI Pei, YUN Ming-Kai, ZHANG Yu-Bao, ZHANG Long, SHAN Bao-Ci and WEI Long. Geometric calibration for a SPECT systemdedicated to breast imaging[J]. Chinese Physics C, 2012, 36(10): 1019-1024. doi: 10.1088/1674-1137/36/10/019

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Received: 2012-01-17
Revised: 2012-02-09

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Geometric calibration for a SPECT systemdedicated to breast imaging

Corresponding author: SHAN Bao-Ci,

Received Date: 2012-01-17

Accepted Date: 2012-02-09

Available Online: 2012-10-05

Abstract: Geometric calibration is critical to the accurate SPECT reconstruction. In this paper, a geometric calibration method was developed for a dedicated breast SPECT system with a tilted parallel beam (TPB) orbit. The acquisition geometry of the breast SPECT was firstly characterized. And then its projection model was established based on the acquisition geometry. Finally, the calibration results were obtained using a nonlinear optimization method that fitted the measured projections to the model. Monte Carlo data of the breast SPECT were used to verify the calibration method. Simulation results showed that the geometric parameters with reasonable accuracy could be obtained by the proposed method.

Geometric calibration for a SPECT systemdedicated to breast imaging

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通讯作者: 陈斌, bchen63@163.com

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Geometric calibration for a SPECT systemdedicated to breast imaging

Corresponding author: SHAN Bao-Ci,

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